| First write the problem. | 3x+4y=-4 x+2y=2 |
| Next get a variable by itself. | x=-2y+2 |
| Now
substitute it into the other equation. |
3(-2y+2)+4y=-4 -6y+6+4y=-4 -2y=-10 y=5 |
| Substitute
your answer back into either of the original equations. |
x+2(5)=2 x+10=2 x=-8 |
| Last check
the answers in an equation. |
(-8)+2(5)=2 -8+10=2 2=2 |
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